Extrudable thermoplastic hydrocarbon polymer composition

Abstract

An extrudable composition comprising thermoplastic hydrocarbon polymer, poly(oxyalkylene) polymer and fluorocarbon polymer. The poly(oxyalkylene) polymer and the fluorocarbon polymer are present in the composition in such relative proportions and concentrations as to reduce the occurence of melt defects during the extrusion of said hydrocarbon polymer composition.

What is claimed is: 
     
       1. A processing additive composition comprising fluorocarbon polymer, which if it is a homopolymer, is derived from vinylidene fluoride or vinyl fluoride, and poly(oxyalkylene) polymer such that the weight of said fluorocarbon polymer in said composition and the weight of said poly(oxyalkylene) polymer in said composition are in a ratio of 1/1 to 1/10. 
     
     
       2. The composition of claim 1 further comprising other adjuvants selected from the groups consisting of stabilizers, fillers antiblocking agents and pigments. 
     
     
       3. The composition of claim 2 where said thermoplastic hydrocarbon polymer is selected from the group consisting of homopolymers of ethylene, homopolymers of propylene, copolymers of ethylene and 1-butene, copolymers of ethylene and 1-hexene, copolymers of ethylene and 1-octene, copolymers of ethylene and 4-methyl-1-pentene, copolymers of ethylene and propylene, copolymers of ethylene and vinyl acetate, copolymers of ethylene and ethyl methyl acrylate, and blends thereof. 
     
     
       4. The composition of claim 1 wherein the weight of said fluorocarbon polymer in said composition and the weight of said poly(oxyalkylene) polymer in said composition are in a ratio of 1/1 to 1/6. 
     
     
       5. The composition of claim 1 wherein said poly(oxyalkylene) polymer has a molecular weight of at least 200. 
     
     
       6. The composition of claim 5 wherein said poly(oxyalkylene) polymer has a molecular weight of 400 to 200,000. 
     
     
       7. The composition of claim 6 wherein said poly(oxyalkylene) polymer has a molecular weight of 400 to 20,000. 
     
     
       8. The composition of claim 1 wherein said poly(oxyalkylene) polymer has the general formula:   A[(OR.sup.1).sub.x OR.sup.2 ].sub.y     where A is an active hydrogen-free residue of a low molecular weight, initiator organic compound having a plurality of active hydrogen atoms; y is 2 or 3; (OR 1 ) x  is a poly(oxyalkylene) chain having a plurality of oxyalkylene groups, (OR 1 ), wherein said R 1  radicals can be the same or different, and are selected from the group consisting of C 1  to C 5  alkylene radicals, x is the number of oxyalkylene units, and said poly(oxyalkylene) chain can be a homopolymer chain, or can be a chain of randomly distributed oxyalkylene groups, or can be a chain having alternating blocks or backbone segments of repeating oxyalkylene groups; R 2  may contain hetero atoms and is selected from the group consisting of H, alkyl, aryl, or combinations thereof.   
     
     
       9. The composition of claim 8 where said poly(oxyalkylene) polymer is poly(oxyalkylene) polyol or derivative of a poly(oxyalkylene) polyol. 
     
     
       10. The composition of claim 6 where said poly(oxyalkylene) polymer is poly(oxyethylene) glycol. 
     
     
       11. The composition of claim 1 wherein said fluorocarbon polymer is selected from the group consisting of copolymers derived from fluorinated monomers and one or more additional fluorinated or non-fluorinated monomers. 
     
     
       12. The composition of claim 11 wherein said fluorocarbon polymer is a copolymer of vinylidene fluoride and hexafluoropropylene. 
     
     
       13. The composition of claim 11 wherein said fluorocarbon polymer is a copolymer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene. 
     
     
       14. The composition of claim 1 wherein said fluorocarbon polymer is a homopolymer of vinylidene fluoride or vinyl fluoride.